Lower pump pressure

Pool pumps, pool filters and the plumbing of
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makdog
Pool Newbie
Pool Newbie
Posts: 2
Joined: Mon 19 Jul, 2010 17:43
My Pool: 15000 gals inground pavers 1hp cartridge
Location: fla

Lower pump pressure

Postby makdog » Mon 19 Jul, 2010 17:48

I just had a new main drain installed, and when the pump was turned on i lost 6 psi , it used to run at 18psi and now runs at 12psi, is this normal with installing a new main drain?


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mas985
Swimming Pool Pro
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Posts: 199
Joined: Tue 08 Sep, 2009 10:40
Location: Pleasanton, CA, USA

Lower pump pressure

Postby mas985 » Mon 19 Jul, 2010 18:02

What was replaced? Cover, pipe, etc.

A more restrictive cover could lower the pressure but I doubt by that much. More than likely, the work caused some debris to clog the pump impeller and/or pipe.
Mark
Hydraulics 101 ; Pump and Pool Spreadsheets ; Pump Ed 101
18'x36' 20k gallon plaster/gunite pool, 1/2 HP 2sp pump, Aqualogic PS8 SWCG, 420 sq-ft Cartridge Filter, Solar Panels, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater
makdog
Pool Newbie
Pool Newbie
Posts: 2
Joined: Mon 19 Jul, 2010 17:43
My Pool: 15000 gals inground pavers 1hp cartridge
Location: fla

Lower pump pressure

Postby makdog » Mon 19 Jul, 2010 18:42

Just the cover was replaced, and new a pool finish, marquis exposed aggregate pool finish. so you think they could half clog the pipes?
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mas985
Swimming Pool Pro
Swimming Pool Pro
Posts: 199
Joined: Tue 08 Sep, 2009 10:40
Location: Pleasanton, CA, USA

Lower pump pressure

Postby mas985 » Tue 20 Jul, 2010 09:33

It's possible. That stuff can get in the pipes if the installer is not careful.
Mark
Hydraulics 101 ; Pump and Pool Spreadsheets ; Pump Ed 101
18'x36' 20k gallon plaster/gunite pool, 1/2 HP 2sp pump, Aqualogic PS8 SWCG, 420 sq-ft Cartridge Filter, Solar Panels, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

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